*{
    padding: 0;
    margin: 0;
}
body,html{
    height: 100%;
}
/* 居中 */
body{
    display: flex;
    justify-content: center;
    align-items: center;
}
.addstudent{
    background-color: #edeadb;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 10px 10px 10px;
    border-radius: 20px;
    box-shadow: 3px 7px 24px black

}
.addstudent h1{
    margin: 10px 0px 10px 0px;
    font-size: 30px;
    font-family: "微软雅黑";
}

.addstudent input{
    line-height: 40px;
    font-size: 25px;
    border-radius: 7px;
}
.addstudent td,button{
    font-size: 25px;
    padding: 10px;

}
button{
    border-radius: 6px;
}
